cpufreq: Initial CPU utilization should be 0

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
cpufreq: export the cpu load across cores to the policy struct. On Performance governor let's emulate a constant 100% load (in this Kernel's case it will make all cores online, which is kinda the purpose of a performance governor isn't it?).

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>